CVE-2020-13645

Publication date 28 May 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

In GNOME glib-networking through 2.64.2, the implementation of GTlsClientConnection skips hostname verification of the server's TLS certificate if the application fails to specify the expected server identity. This is in contrast to its intended documented behavior, to fail the certificate verification. Applications that fail to provide the server identity, including Balsa before 2.5.11 and 2.6.x before 2.6.1, accept a TLS certificate if the certificate is valid for any host.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
balsa	20.04 LTS focal	Fixed 2.6.0-2ubuntu0.1
	19.10 eoan	Fixed 2.5.6-2ubuntu0.1
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release
glib-networking	20.04 LTS focal	Fixed 2.64.2-1ubuntu0.1
	19.10 eoan	Fixed 2.62.1-1ubuntu0.1
	18.04 LTS bionic	Fixed 2.56.0-1ubuntu0.1
	16.04 LTS xenial	Fixed 2.48.2-1~ubuntu16.04.2
	14.04 LTS trusty	Not in release

Notes

mdeslaur

fixing this issue in glib-networking will require fixing balsa too

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
balsa	Upstream: e8952e3
glib-networking	Upstream: 2951394

Severity score breakdown

Parameter	Value
Base score	6.5 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N